Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcb2c159831b346…

MALICIOUS

PDF

42.4 KB Created: 2020-03-23 03:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d99eedb0900ef6eabe20393769cb9d39 SHA-1: 004fa99e449e8863370177ccd2ff6422871941f2 SHA-256: 5fcb2c159831b3467c68405b710bb02f1275b2d8e08314088f4b484422215b6b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains a mix of seemingly legitimate product names and technical metadata, alongside the embedded URLs, suggesting a deceptive lure. The primary goal appears to be directing users to a network of linked websites, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://makeupandexhale.com/uploads/1/3/0/8/130813586/130813586.html#euro-pro+shark+steam+mop+white+seafoam
    • http://emilyhardingfit.com/uploads/1/3/0/9/130969448/395bbffc91da.pdf
    • http://littleweddingplanner.co.uk/uploads/1/3/0/8/130873791/zepilazemapil.pdf
    • http://blackseedorganicoil.com/uploads/1/3/0/6/130604537/nalosata-gamusunaj-senimalokemek.pdf
    • http://www.thelearndastronomermusic.com/uploads/1/3/0/6/130622009/nimoxoduvojoxi.pdf
    • http://spacecenterfamilypractice.com/uploads/1/3/0/3/130379527/mifoma-pilujanakabizox.pdf
    • http://707merch.com/uploads/1/3/0/6/130639165/tafodeluwuj.pdf
    • http://www.nolamakesart.com/uploads/1/3/0/2/130273899/wexafesapezixi_mofemik_tapibuvafi_tewujakog.pdf
    • http://yogalkn.com/uploads/1/3/0/4/130476579/db339c13.pdf
    • http://dramallamaranch.com/uploads/1/3/0/5/130588459/3474946.pdf
    • http://joepage.org/uploads/1/3/0/6/130640006/xeruwuwozakori.pdf
    • http://zoescopestudio.com/uploads/1/3/0/4/130436521/2825990.pdf
    • http://pocketndt.net/uploads/1/3/0/7/130776319/db47d4bdc222b6a.pdf
    • http://www.megasecurity.co.nz/uploads/1/3/0/7/130776061/05f6984477.pdf
    • http://worldport.shop/uploads/1/3/0/7/130776607/pinezofonodarem.pdf
    • http://httpwww.shop/uploads/1/3/0/5/130539934/visun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006921.bin
1d6f602fd2873423013fdded7521fa605be9f60e54044eb38261b62fd8539a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6921 7712 bytes
font_01_sfnt_off00008740.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8740 16036 bytes

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